Question

A rectangle has sides of length 6.1cm and 8.1 cm correct to 1 decimal place.

Calculate the upper bound for the area of the rectangle as accurately as possible.

Answer 1

Area = length * width = 6.1*8.1 = ?

Answer 2

49.4

Answer 3

The question says to calculate the U.B for the area of the rectangle. Hence we need to take the U.B of length as well as the width.

It also says "correct to one decimal place" = 0.1 / 2 = 0.05 (limit)
To calculate the U.B,
8.1+ 0.05= 8.15
6.1+0.05= 6.15
Therefore, area= length*width
8.15*6.15= 50.1225

(To calculate the L.B, subtract 0.05 with number)

Answer 4

[AI-generated answer — Explain Bot]

To calculate the upper bound for the area of a rectangle, we must consider the maximum possible dimensions for each side.

Given that the length of the rectangle is 6.1cm and the width is 8.1cm, and since both values are correct to one decimal place, we can determine the upper bound by rounding up both dimensions.

Rounding up 6.1cm to one decimal place gives us 6.2cm, and rounding up 8.1cm to one decimal place gives us 8.2cm.

Now, we can calculate the upper bound area by multiplying the rounded-up dimensions:

Upper bound area = 6.2cm * 8.2cm

Upper bound area = 50.84 cm²

Therefore, the upper bound for the area of the rectangle, correct to 1 decimal place, is 50.8 cm².